1. Dep. of Geography and Geology; Univ. of Copenhagen; Oester Voldgade 10 DK-1350 Copenhagen Denmark
2. Data and Climate Division; Danish Meteorological Institute; Lyngbyvej 100 Copenhagen Denmark
3. Dep. of Hydrology; Geological Survey of Denmark and Greenland; Øster Voldgade 10 DK-1350 Copenhagen K Denmark